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【多选题】
描述时序逻辑电路的方法有很多,选出最合适、最常用的表示方法:A.
逻辑函数式
B.
方程组
C.
真值表
D.
状态转换真值表
E.
时序波形图
F.
状态转移图
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举一反三
【单选题】下列有关电位与电压的说法，错误的是______。
A.
某点电位是该点到零电位参考点之间的电压
B.
两点间电压即两点间电位差，与零电位参考点无关
C.
电位就是电压
D.
电位与电压的单位相同
【单选题】Space Shuttle Project is one of the first huge-typed spaceflight instruments used for many times in the world, organized by American National Aviation and Spaceflight Bureau, the main researches of【1】...
A.
what
B.
which
C.
where
D.
that
【简答题】Aviation instruments can be divided as flight instruments, and auxiliary instrument.
【简答题】Task 3 Listen and fill in the blanks with appropriate words. Friends boyfriend and girlfriend strangers colleagu e cl assmate parents Conversation 1 Martha is Jim's(1) __________ The two people talki...
【单选题】Why does lan think he was successful in his first job?
A.
He communicated well with colleagues.
B.
He found a new way of doing things.
C.
He worked extremely hard.
【单选题】What, in the writer's opinion, happens to a scholar who shares his ideas with his colleagues?
A.
He gains recognition for his achievements.
B.
He attracts large numbers of students.
C.
He risks his ideas being stolen.
D.
He is considered slightly mad.
【简答题】Passage 1 Questions 1 to 5 are based on the following passage. According to Daniel Lieberman, a professor of human evolutionary biology at Harvard University, “People have been running barefoot for mi...
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